A very nice and historically important collection relating to the invention of the Light Emitting Diode or LED, one of the most important energy efficient technologies of the twentieth century.
The highlight of the collection is a preprint version of Nick Holonyak and S.F. Bevacqua, ‘Coherent (Visible) Light Emission from Ga(As1−x Px) Junctions’, Applied Physics Letters 1 (December 1962), pp. 82–83. The standard work on the subject describes this paper as follows:
“The beginning of visible-spectrum LEDs dates back to the year 1962 when Holonyak and Bevacqua reported on the emission of coherent visible light from GaAsP junctions in the first volume of Applied Physics Letters.” (Schubert, Light Emitting Diodes, p.8)
The paper is contained in a folder with associated archival material, including one other related preprint and some later commercial materials.
Very good condition, noting some fragile cheap paper used for some of the archival material.